Help with Dragino LSN50-V2

Hello, everyone. I need help with the LSN50-V2 node, I am trying to send a data with AT commands, this data must be from an MB7389 ultrasound sensor and it must reach the Mini Ultra Pro V3 device. I used the commands to change it to mode 2 (Ultrasonic) and change different parameters such as channels (US915 CH1) but it is not sending the data. Does anyone know what to do? I need it for my college degree project. Thank you